Lisa Lau Tu, also known by her Chinese name Chuan-Yu Lau, was 42 when she was last seen in Potomac, Maryland, on July 14, 1988. She was 5 feet 4 inches, about 160 pounds, with brown hair and brown eyes, pierced ears and a one-inch vertical scar in the center of her chest. She and Gregory Mung-Sen Tu had lived together in a home titled solely in her name.

Gregory told investigators he drove Lisa to the airport for a 5:00 p.m. flight to San Francisco, but that account contained inconsistencies: the friend in San Francisco was not ill and had not been in contact with Lisa for months, her assigned airplane seat was empty, and some favorite dresses and a suitcase were missing while other usual travel items were left behind. Two days after she vanished, Gregory paid a garbage collector to remove a loveseat Lisa often slept on.

Investigators treating the case as a homicide found a large amount of Lisa’s blood in the basement near where the loveseat had been, with a trail to the bathroom and upstairs, and a spot of blood on Gregory’s car dashboard; a meat cleaver, twine and plastic wrap were also found in the car.

Does anyone have information about Lisa’s last known movements in Potomac or recall seeing her around July 14, 1988?